Bolster.



No. 783,791. PATENTEDJULY 14, 1903... C. B- ALBREE. BLSTER.

APPIIOATION FILBD MAB.. ZO. 1903.

y HO MODEL.

TH: wams verrais ca. dnnrwuwomsnmcrou. n4 c e of special shapes.

vide such a bolster wherein allthe rivets 5o the bolster.

No. '733,791. Y

UNITED STATES atented duly 14.,

PATENT OFFICE.

BoL'sTER.

srEcIFrcA'rIoN forming part of Letters Patent No. 733,791, dated July14, 1903.

Application filed March 20, 1903.

.To all whom, t may concern.' F,

Be it known that I, CHEsTER B. ALBREE, of Allegheny, in the county ofAllegheny and State of Pennsylvania, have invented a new 5 and usefulBolster, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming part of thisspecification, in which- Figure 1 is a side elevation showing one 1oform of my improved bolster.

r5 tion of a modied form with end tie-plates.

Fig. 6 is an end elevation of the form of Fig. 5, and Figs. 7 and 8 areend elevations showing other modifications.

My invention relates to the class of bol- 2o sters for railway-cars andcar-trucks, especially the latter, and is designed to provide a bolsterwhich may be lformed of commercial rolled shapes or sections and plateswithout the necessity of any Hanging or pressing up It is alsodesignedto promay be driven by horseshoe-yoke compression-riveters to avoid theexpenseY of handriveting with internal dolly-bars and at the 3o sametime to obtain a bolster of great strength of an upper pair of Z-bars 22, with their upper anges 3 projecting outwardly and their lower flanges4 projecting inwardly, and a lower pair of Z-bars 5 5, with their upperdanges 6 projecting inwardly and registering 4o with the flanges 4 andwith their lower flanges 7 projecting outwardly and riveted or otherwisesecured'to the lower tension member or cord 8. This lower cord consistsof aplate of rectangular form, which is bent or curved downwardly inritsintermediate portion to conform to the downwardly bent or curvedintermediate portions of the lower Z -bars 5 5. The end portions of theflanges 4 and 6 iit against and are riveted to each other within Betweenthese points the lower Z-bars are bent downwardly, as shown in Fig. 1,and at the center I provide one or vbolster I may use other shapes.

7 I show an upper pair of channels 13, withserial No. 143,723. (No modemmore struts or columns 9, which extend bel tween and space apart theiianges 4 and 6 at this point, being secured by long rivets 10 or othersuitable means.

To the top flanges 3 3 of the upper Z-bars I rivet the upper cord ortension members 11, which consist of a plane rectangular plateconforming to the shape of the bolster.

Instead of arranging the Z-bars with their coacting lianges projectinginwardly I may reverse them, as shown in Fig. 4. `In this form the upperflanges 3 vproject inwardly, as do also the lower Hanges 7a, and theintermediate flanges 4a and 6"L project outwardly in opposite directionsand' are riveted together, as before.

In Figs. 5 and 6 I show a form similar to that of Figs. 1, 2, and 3,except that tie-plates 12 arefsecured between the end portions of theanges 4b and 6". These tie-plates strengthen the bolster and serve asadditional means for securing the Z-bars together in their end portions.Where the Z- bars are used in upper and lower pairs, the upper flangesof one bar of each pair must project in the opposite direction to thatof the other of the pair.

Instead of using Z-bars for forming the T husin Fig.

their anges 14 projecting outwardly, these channels resting on asimilarly-arran ged pair of channels 15 below them and havingcorresponding Iianges 16. The lower pair ofchannels will be bentdownwardly in their intermediate portions, as in the Z-.barconstruction, and the upper and lower cords or plates 17 and 18 areriveted to the flanges@ In Fig. 8 I show another form where two pairs ofI-beams 19 and 20 are arranged in superimposed position similar to thatof Fig. 7 with the upper and lower side plates 2l and 22.

In all of the forms the depth at the center of the bolster is increased,andthis may be done by bending either one'of the pairs of rolledsections or by bending both pairs in opposite directions, and I intendto cover either of these constructions in my claims.

The advantages of my invention result from the strength of the bolster,for the amount of material contained, and from the ease and IOOcheapness with which the bolster may be made and repaired. The rivetingmay be cheaply'and rapidly carried out by the ordinary U-shaped riveter,avoiding the use of dolly-bars and hand labor. The construction adaptsitself readily to either cars or cartrucks and is free fromvertically-projecting Hanges, which would increase the height of thebolster.

The rolled shapes may be varied, the means for increasing the depth atthe center may be changed, and many other variations may be made in theform and arrangement of the sections and upper and lower cords withoutdeparting from my invention.

I claiml. A bolster having a lower pair of rolled anged shapes arrangedside by side, and another pair of rolled flanged shapes superimposedthereon and having all parts thereof above the level of the lower pair,the depth of the bolster being greater at the center than at the end;substantially as described.

2. A bolster having a lower pair of iianged shapes arranged side byside, an upper pair of anged shapes superimposed thereon, the endportions of the lower fianges of the upper pair resting on the upperflanges of the lower pair, the depth of the bolster being greater at thecenter than at the ends; substantially as described.

3. A bolster having a lower pair of anged shapes arranged side by side,an upper pair of fianged shapes superimposed thereon, the

lower flanges of the upperpair being in contact with the upper flangesof the lower pair at the end portions of the bolster and separated fromthem at their intermediate portion, and upper and lower plates coveringthe top and bottom of the bolster; substantially as described.

4. A bolster having a pair of Z-bars arranged side by side with theirflanges projecting in opposite directions, an upper pair of similarlyarranged Z bars superimposed thereon, the lower flanges of the upperpair resting on the upper fianges of the lower pair in the end portions,at least one of the pairs being bent or curved away from the other pairfrom the central portion of the bolster; substantially as described.

5. A bolster having a pair of Z-bars arranged side by side with theirflanges projecting in opposite directions, an upper pair of similarlyarranged Z bars superimposed thereon, the lower flanges of the upperpair resting on the upper flanges of the lower pair in the end portions,at least one of the pairs being bent orcurved away from the other pairfrom the central portion of the bolster, and a strut between the centralportions of the pairs; substantially as described.

In testimony whereof I have hereunto set my hand.

CHESTER B. ALBREE.

Witnesses:

Guo. l5. BLEMING, H. M. CORWIN.

